Improved drilling-machine



1. SMITH. Hand Meta] Drill,

No. 103,515. Patented May 24, 1870.

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NPQ'ERS. PHOTO-LITHDGRAPHER. WASHINGTON 5 C.

. I do hereby declare specification, and in parts in both figures.

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Letters Patent No. 103,515, dated May 24, 1870.

IMPROVED DRILLING-MACHINE.

The Schedule referred to in these Letters Patent and making part or the same To all whom it may concern:

Be it known thatI, Jatrns SMITH, of New Haven, in the coiuity of New Haven and State of Connecticut, have invented anew and Improved Press-Drill; and

V that the following is a full, clear, and exact description of the same, reference being bad to thcaccompauying drawing which forms part of this which,

Figures land 2 represent longitudinal viewsof my improved drill, having such portions thereof represented in section, as are necessary for the better illustration of their working parts, and taken at right an gles to each other.

Similar letters of reference indicate corresponding This invention consists in a press-drill of novel construction, whereby it maybe used in combination-with a fixed holder and feed platform, or as a hand .or breast-drill.

.Referring to the accompanying drawing I A is a metal frame, which may be screwed up in a rice, or otherwise secured, while the drill is being operateda g .At the upper end of this frame A is formed abayonet socket, a, for reception of the upper. portioujof the apparatus, which is made removable from the lower portion, for a purpose hereinafter explained.

At. or near its lower end is a bearing-frame, b, in which is-fitted the stem of a sliding platform, B.

The sliding or feeding motion of this platform B is effected by the raising or lowering of a hand-lever, H, arranged to turn on a fixed axle, w, and which carries a fixed pinion, g, operating in cogs formed on the stem of said platform.

.Fitted within the socket a is the lower extremity of a removable frame or stock, 0,.containing the drillsocket c.

This drill-socket c is provided at or near its upper 'character of material may, when removed from the lower end with fixed beveled pinions e 0, one of which is made to gear at different times with thelargeaand the other with the smaller circles of teeth at d, of a beveled driving-wheel, D, so that. by the turning of the said driving-wheel, the drill-socket c is driven at a greater or less relative speed, according as it is geared with the larger or smaller circle of teeth.

The changing of this relative motion may be effected by first loosening the fixed axle j; upon which the driving-wheel turns, and slipping it up or downin the slot s of the stock C, so as to effect an engagement of the larger circle of teeth (I with the pinion e, or the smaller circle ll with the pinion e, as may be desired.

It preferrdyin'the construction of the apparatus, the axle f may he made stationary, and .the sliding motion necessary for varying the speed be imparted to the pinion or pinions 0, whereby the same end may be attained. By this means, the drill may be made to "run fast or slow to suit the size of the drill, and the on which it is being used. By providing the upper or removable portion or stock 0 of the apparatus with a breast-bearing, I, it portion A, serve as a breast-drill, or a hand-drill; and, having the said variable motion as above described, it will. prove an cflicient implement in said capacity.

The bearing-frame b of the platform B may beadjusted upward or downward on the frame A, wh'eii 'desirable for 'any pu p0se,'by first loosening the nut m.

What is here claimed, Letters Patent, is-

The combination of the-platform B and the mechanisrn to support and adjust the same with the socket a, breast-bearing I, and drilling apparatus, substantially as described, and arr'angedto operate in the manner set forth.

and desired to be secured by JAMES SMITH. 

